The porcelain stoneware tiles of the Lab_21 collection hark back to historical Mediterranean architecture by reinventing the art of "opus signinum"; an ancient technique of making floors by crushing slate, lime roof tiles and grains of stone. These lively, highly tactile surfaces have a rich material effect with a strongly granular texture, a characteristic that makes them easy to combine with a wide variety of decorations. Lab_21 is a collection with a clean effect, characterised by exceptional technical performance, making it suitable for both indoor and outdoor flooring.